10,000 hp top fuel dragsters are also pushing a lot more exhaust than a 3800...Originally Posted by blackspike2710
You need enough pressure in the pipes to keep velocity up, because as the gasses are leaving at a high velocity they're creating a vacuum behind them that helps pull the gasses farther upstream out better, which helps pull the gasses farther behind, etc
If the pipes are too big the gasses are going to slow down in some areas, while being faster in other areas, making turbulence and choppy flow which overall hurts the dynamics of the system.
And no, having a dual muffler cat back isnt going to hurt anything, some of them come factory that way, all you need is the pipe that splits after the cat.. I think it bolts into the cat end of the dp and then goes into the res and then splits right after the res.
